| Peterson Creek | |
| Pushpin Map: | Canada Southern Ontario |
| Pushpin Map Caption: | Location of the mouth of Peterson Creek in southern Ontario |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Ontario |
| Subdivision Type3: | Region |
| Subdivision Name3: | Eastern Ontario |
| Subdivision Type4: | Counties |
| Subdivision Type5: | Townships |
| Length: | 6.5km (04miles) |
| Source1: | Upper Peterson Lake |
| Source1 Location: | South Frontenac, Frontenac County |
| Source1 Coordinates: | 44.5119°N -76.3308°W |
| Source1 Elevation: | 147m (482feet) |
| Mouth: | Hart Lake |
| Mouth Location: | South Frontenac, Frontenac County |
| Mouth Coordinates: | 44.5364°N -76.3242°W |
| Mouth Elevation: | 120m (390feet) |
| River System: | Lake Ontario drainage basin |
Peterson Creek is a river in the Lake Ontario and Cataraqui River drainage basins in South Frontenac, Frontenac County and Rideau Lakes, Leeds and Grenville United Counties in eastern Ontario, Canada. It flows 6.5km (04miles) from Upper Peterson Lake to its mouth at Hart Lake.
Peterson Creek begins at Upper Peterson Lake in South Frontenac township at an elevation of 147m (482feet) about 4km (02miles) north of the community of Keelerville. It flows northeast through Lower Peterson Lake to Gamble Bay on Crow Lake. The creek continues northeast through the lake into Rideau Lakes township and exits the lake at the north end at Ormonds Bay. It then flows southwest, re-enters South Frontenac township, and reaches its mouth at the north centre of Hart Lake at an elevation of 120m (390feet), about 7.3km (04.5miles) southwest of the community of Jones Falls. Hart Lake drains through two outlets, each of which eventually empty into the Cataraqui River, which flows to Lake Ontario at the city of Kingston.